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IMPORTANT!
Keep the receiver away from central heating radiators and electric heaters.
Never expose it to direct sunlight.
Use the receiver in dry rooms only.
TECHNICAL DATA
Modulation
Carrier frequencies
AF frequency response
THD
Signal-to-noise ratio
Operating time with one accupack
Weight with / without accupack
Max. sound pressure level
SPECIAL TECHNICAL DATA
Audio output on the RI 250-S and
Induction loop output on the RI 250-J
SENNHEISER TECHNOLOGY AND SENNHEISER SERVICE ARE FUTURE-ORIENTED
Even after many years, you will still have unlimited pleasure from your infra-
red sound transmission system. You can buy replacements for wearing parts
such as ear-cushions and accupacks for many years to come. And in the unlikely
event that any repairs should be necessary, Sennheiser service departments
worldwide give moderately priced, fast and competent repairs.
ACCESSORIES
BA 151 accupack
Black ear-cushions, firmer version
White ear-cushions, softer version
L 151 charger for two accupacks
L 151-10 charging unit for 10 receivers or 10 accupacks
22
RI 250 (all variants) RI 500 / HDI 302
FM, mono
FM, stereo
2.3 MHz
2.3 MHz / 2.8 MHz
18-18,000 Hz
18-18,000 Hz
< 1 %
< 1 %
typ. 70 dB
typ. 64 dB
approx. 6 h
approx. 5 h
45 g / 35 g
45 g / 35 g
130 dBA
130 dBA / 126 dBA
750 mV / 32 Ω
Cat. no. 04146
EP1 Cat. no. 04655
EP2 Cat. no. 04656
Cat. no. 04457
Cat. no. 04494
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